VERIFIED SOLUTION i

Adjusting the contrast on the DM300-DM475

Products affected:
DM300c™, DM400c™, DM475™ (G920)
DM300M™, DM400M™, DM475M™ (G922)
Follow these steps to lighten or darken the screen:
  1. Press Menu
  2. Select "Setup"
  3. Select "Display Contrast"
  4. Select "Increase Contrast" or "Decrease Contrast" to change the contrast level
  5. Select "Accept" to save
  6. Press Home to return to the Main screen

For further troubleshooting steps, see article "Resolve no power or a blank display on the DM300, DM400 and DM475".
UPDATED:  19 July 2019